Roger Grigman

Sergeant Roger Grigman was a member of Team Red Light and a good friend of Dennis Riley. He also serves as the second boss of Extermination.

History
At some point in his career, Roger was sent on a mission in Cambodia and saves Dennis from being killed by guerilla fighters.

On December 24th, 2005, Roger was among the marines to be sent to Fort Stewart after receiving a distress signal. After the plane malfunctions, Roger lands at the rear entrance of the complex along with Dennis and guides his friend to the ventilation shaft.

Upon entering the facility, Roger takes shelter in a control room near a drawbridge and sends Dennis to recon the rest of the tunnel. After Dennis turns the power back on, Roger encounters about five creatures known as Hydras, or Bugs and becomes mutated by them, much to Dennis' horror. But before he could attack Dennis, Cindy Chen shoots Roger several times, seemingly killing him.

Later, it is revealed that the monster Roger is still alive and is on the roof of the Power Reactor where he ambushes Major Madigan. He is confronted by Dennis and finally killed after a fierce battle, leaving only his knife.